摘要
铝、镁、钛等合金材料常被用作3C机身结构件,尤其是制作笔记本电脑和手机的外壳时,不仅要求表面硬度高、耐磨性好,还要求其外观华丽精致,微弧氧化着色膜也因此成为研究热点。概述了微弧氧化着色膜的着色原理、着色方法,包括改变电解液组成、改变合金组成等,基于目前采用最多的添加过渡金属盐的方法对着色的颜色种类如黑色、棕色、蓝色、绿色等进行了重点论述,分析了微弧氧化膜的着色原因及显色物质成分,并在此过程中探讨了可能会对膜层颜色产生影响的工艺参数,揭示了微弧氧化着色膜层存在的光泽度低、色彩暗淡无光等问题。为解决微弧氧化着色膜装饰性较差的问题,使其更好地应用于电子产品,其未来的发展方向将是:(1)深入研究微弧氧化着色机理;(2)改善微弧氧化电解液体系;(3)探索工艺参数影响,以提高着色膜的装饰性;(4)拓展微弧氧化膜的颜色种类,从而满足更多场景的应用需求。
With the development of ultra-thin,ultra-light,and miniaturization of electronic products,more and more alloy materials such as aluminum,magnesium and titanium were used in 3C fuselage structural parts.Electronic products,especially the casings of laptop computers and mobile phones,not only require high surface hardness and good wear resistance,but also require gorgeous and exquisite appearance,for which reason micro-arc oxidation colored films have become a research hotspot.In this paper,coloring methods of micro-arc oxidation coatings were firstly summarized,including changing the composition of electrolyte as adding inert colorant or transition metal salt and changing the composition of alloy as doping transition metal elements,etc.Among which,adding transition metal salts to the electrolyte was the most used,for which reason,a variety of works preparing micro-arc oxidation coating in black,brown,blue,and other colors in this way were reviewed subsequently.In the research of black and brown micro-arc oxidation coatings,the transition metal salts were converted into their corresponding oxides and then melted and deposited on the alloy matrix during the MAO process.The color of coatings came from their corresponding transition metal oxides.In the research of blue micro-arc oxidation coatings,although method was the same as that mentioned above,with the addition of transition metal salts,the reason for the colored coatings was disparate.The first research reported the matrix Al2O3 formed a bluish solid solution with Ti3+iron added that colored the coating blue;another research reported the matrix Al2O3 combined with Co2+to form the cobalt blue that colored the coatings blue.In the research of green micro-arc oxidation coatings,although the addition of different substances(Cr2O3 and K2Cr2O7)containing the same transition metal element Cr as colorants,the green coatings were both prepared and illustrated that there were different ways to color the coatings even with the same element.In the research of yellow micro-
作者
郭俊灏
张德忠
赵涛
陈文选
郭涌
GUO Junhao;ZHANG Dezhong;ZHAO Tao;CHEN Wenxuan;GUO Yong(Wuhan Research Institute of Materials Protection Co.,Ltd.CAM,Wuhan 430030,China;Shanghai Youzhuo Chemical Technology Development Co.,Ltd.,Shanghai 201800,China;Shenzhen Yuancheng Fine Chemical Development Co.,Ltd.,Guangdong Shenzhen 518100,China)
出处
《表面技术》
EI
CAS
CSCD
北大核心
2024年第14期45-55,共11页
Surface Technology
关键词
微弧氧化
着色膜
着色剂
着色机理
轻合金
micro-arc oxidation
colored coating
colorant
coloring mechanism
light alloy
